I have the one-leg stand exercise in one of the supersets, and the timer countdown doesn't always play (the voice counting down time every 5 seconds). It's either it calls te time correctly for the whole set or that it's not there at all for the whole set. The tick sounds play just fine consistently, it's just the voice. Maybe it's because of the odd? exercise duration? Last time it was 52 seconds and it didn't play for the 1st set. Before that 44 seconds and it didn't play for sets 2 and 3.